The electrostatic fields and discharge hazards of insulating sheets close to a conductor: a review

Dielectric sheets and films are used in various forms in a large number of industrial applications. The important electrostatic properties of such sheets are reviewed to highlight the significance of the surface potential, the electric field within and adjacent to the sheet, and the electric energy stored. Selected industrial examples in the fields of electrophotography, electrostatic painting and materials handling are discussed. A case study of a specific industrial problem involving charge retention on plastic boxes treated in an AC corona discharge is described.